Device and method for detecting a manipulation of an...

H - Electricity – 04 – L

Patent

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H04L 9/32 (2006.01)

Patent

CA 2587277

The invention relates to a device for the detection of a manipulation of an information signal, comprising a device (101), for the extraction of an information signal component, characteristic of the information signal, from the information signal, a device (103), for encryption of the information signal component to give an encrypted signal and a device (105), for comparison of the encrypted signal with a reference signal, whereby the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal, in order to detect the manipulation.

L'invention concerne un dispositif servant à détecter une manipulation d'un signal d'information. Ce dispositif comprend : un système (101) conçu pour extraire, du signal d'information, une composante de signal d'information qui est caractéristique dudit signal d'information ; un système (103) destiné à crypter cette composante de signal d'information pour obtenir un signal crypté, et ; un système (105) pour comparer le signal crypté avec un signal de référence, ce signal de référence étant une représentation cryptée d'une composante de signal de référence non manipulé d'un signal d'information de référence, pour détecter la manipulation.

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